diff --git a/dlls/winmm/waveform.c b/dlls/winmm/waveform.c
index 42b888e1ac..dffc002c24 100644
--- a/dlls/winmm/waveform.c
+++ b/dlls/winmm/waveform.c
@@ -1243,10 +1243,17 @@ static LRESULT WOD_Open(WINMM_OpenInfo *info)
             lock = &g_devthread_lock;
             internal_index = MAPPER_INDEX;
         }else{
-            if(info->req_device >= g_outmmdevices_count)
-                return MMSYSERR_BADDEVICEID;
+            if(info->req_device >= g_outmmdevices_count) {
+                WINMM_Device *device = WINMM_GetDeviceFromHWAVE((HWAVE)info->req_device);
+
+                if(device == NULL) return MMSYSERR_BADDEVICEID;
+
+                mmdevice = device->parent;
+            }
+            else {
+                mmdevice = read_map(g_out_map, info->req_device);
+            }
 
-            mmdevice = read_map(g_out_map, info->req_device);
 
             if(!mmdevice->out_caps.szPname[0])